html_doc = """
<html><head><title>The Dormouse's story</title></head>
<body>
<p class="title"><b>The Dormouse's story</b></p>

<p class="story">Once upon a time there were three little sisters; and their names were
<a href="http://example.com/elsie" class="sister" id="link1">Elsie</a>,
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;
and they lived at the bottom of a well.</p>

<p class="story">...</p>
"""

from bs4 import BeautifulSoup

soup = BeautifulSoup(html_doc, 'lxml')
# html进行美化
# print(soup.prettify())

print(soup.title) #获取标签title
print(soup.title.name) # title的名字
print(soup.title.string) # 获取内容
print(soup.title.parent)
print(soup.title.parent.name)

print(soup.p)

print(soup.p['class'])

print(soup.a)
print(soup.find_all('a'))

print(soup.find(id='link3'))

for link in soup.find_all('a'):
    print(link.get('href'))
print(soup.get_text())

# print('----')
# import re
# soup.find(string=re.compile("sisters"))

print(soup.select("title"))
print(soup.select("b"))
print(soup.select(".sister"))
print(soup.select("#link1"))
print(soup.select("p #link2"))
print("-"*100)
print(soup.select("p > #link2"))